Boat trailer bearing



FIG. 1 is a front elevational view of a boat trailer bearing showing my new design, the rear view being a mirror image of the front view shown;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left end elevational view thereof;

FIG. 5 is a right end elevational view thereof; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a boat trailer bearing, as shown and described. 